galaxies

简明释义

英[ˈɡæləksiz]美[ˈɡæləˌkiz]

n. [天]星系；银河系（galaxy 的复数）

英英释义

单词用法

同义词

反义词

例句

1.Which came first, black holes or galaxies?

是先有黑洞呢？还是先有星系？

2.Without it, galaxies and clusters of galaxies should fly apart.

如果没有，星系及星系群应该会分崩离析。

3.They turned their telescopes toward other nearby galaxies.

他们把望远镜转向附近的其他星系。

4.Large galaxies grow by eating small ones.

大星系靠吃掉小星系来成长。

5.Over billions of years, the gas was compressed by gravity into galaxies, stars, plants and eventually, even humans.

在数十亿年的时间里，这些气体被引力压缩成星系、恒星、植物，最终甚至变成了人类。

6.Until recently most astronomers believed that the space between the galaxies in our universe was a near-perfect vacuum.

直到最近，大多数天文学家都认为我们宇宙中星系之间的空间是近乎完美的真空。

7.Recent findings lend strong support to the theory that a black hole lies at the center of the Milky Way and of many of the 100 billion other galaxies estimated to exist in the universe.

最近的发现有力地支持了这样一种理论，即银河系中心，和宇宙中估计存在的1000亿个其他星系中的许多里有一个黑洞。

8.Astronomers have discovered several new galaxies in the distant universe.

天文学家在遥远的宇宙中发现了几种新的星系。

9.The Milky Way is just one of billions of galaxies in the observable universe.

银河系只是可观测宇宙中数十亿个星系之一。

10.Some galaxies are spiral-shaped, while others are elliptical.

一些星系是螺旋形的，而另一些则是椭圆形的。

11.Scientists study the formation of galaxies to understand the early universe.

科学家研究星系的形成，以了解早期宇宙。

12.The Andromeda galaxy is on a collision course with our own galaxy.

仙女座星系正朝着我们自己的星系撞去。

作文

The universe is a vast expanse filled with countless wonders, and among these wonders are the magnificent galaxies. A galaxy is a massive system that consists of stars, stellar remnants, interstellar gas, dust, and dark matter, all bound together by gravity. The sheer scale of galaxies is mind-boggling; our own Milky Way galaxy is estimated to contain over 100 billion stars, each potentially hosting its own planetary systems. When we gaze up at the night sky, we are actually looking into the depths of our own galaxy, as well as other distant galaxies that are millions or even billions of light-years away. There are many types of galaxies, including spiral, elliptical, and irregular galaxies. Spiral galaxies, like the Milky Way, have beautiful arms that wind outward from their centers, while elliptical galaxies tend to be more rounded and featureless. Irregular galaxies, on the other hand, lack a distinct shape and often result from gravitational interactions between galaxies. Each type of galaxy provides astronomers with valuable insights into the formation and evolution of the universe. The study of galaxies helps scientists understand the fundamental processes that govern the cosmos. For instance, the interaction between different galaxies can lead to spectacular phenomena such as galactic collisions, which can trigger new star formation and drastically alter the structure of the involved galaxies. These interactions reveal the dynamic nature of the universe and how galaxies evolve over time. Furthermore, galaxies are essential for understanding the distribution of dark matter in the universe. Dark matter, which makes up about 27% of the universe’s mass-energy content, cannot be observed directly but can be inferred through its gravitational effects on visible matter, including galaxies. By studying the rotation curves of galaxies, astronomers can deduce the presence and distribution of dark matter within and around them. In addition to their scientific significance, galaxies also inspire a sense of wonder and curiosity. The idea that there are billions of galaxies beyond our own, each with its own unique characteristics, ignites the imagination and encourages us to ponder our place in the universe. The Hubble Space Telescope has captured stunning images of distant galaxies, revealing intricate details and colors that highlight the beauty of the cosmos. These images serve as a reminder of how small and interconnected we are within the grand tapestry of the universe. In conclusion, galaxies are not just collections of stars; they are the building blocks of the universe, containing the history of cosmic evolution etched in their structures. By studying galaxies, we unlock the secrets of the universe and gain a deeper appreciation for the complexity and beauty of the cosmos. Whether through scientific inquiry or artistic inspiration, the exploration of galaxies will continue to captivate humanity for generations to come.

宇宙是一个充满无数奇观的广阔空间，其中之一就是壮丽的星系。星系是一个庞大的系统，由恒星、恒星残骸、星际气体、尘埃和暗物质组成，所有这些都被引力束缚在一起。星系的规模之巨大令人难以置信；我们自己的银河星系估计包含超过1000亿颗恒星，每颗恒星都有可能拥有自己的行星系统。当我们仰望夜空时，实际上是在凝视我们自己的星系的深处，以及其他遥远的星系，它们距离我们数百万甚至数十亿光年。 有许多类型的星系，包括螺旋星系、椭圆星系和不规则星系。螺旋星系，如银河，拥有从中心向外盘旋的美丽臂膀，而椭圆星系则更趋于圆形且特征模糊。不规则星系则缺乏明显的形状，通常是由于星系之间的引力相互作用而形成的。每种类型的星系都为天文学家提供了有关宇宙形成和演化的宝贵见解。 对星系的研究帮助科学家理解支配宇宙的基本过程。例如，不同星系之间的相互作用可能导致壮观现象，如星系碰撞，这可以触发新的恒星形成，并大幅改变参与的星系的结构。这些相互作用揭示了宇宙的动态性质以及星系随时间演变的方式。 此外，星系对于理解宇宙中暗物质的分布至关重要。暗物质约占宇宙质量能量内容的27%，虽然无法直接观察，但可以通过其对可见物质（包括星系）的引力效应推断出来。通过研究星系的旋转曲线，天文学家可以推断出暗物质在其内部和周围的存在和分布。 除了科学意义，星系还激发了人们的敬畏和好奇。想到我们以外还有数十亿个星系，每个都具有独特的特征，这点燃了想象力，鼓励我们思考在宇宙中的位置。哈勃太空望远镜捕捉到了遥远星系的惊艳图像，揭示了细致入微的细节和色彩，突显了宇宙的美丽。这些图像提醒我们，在宇宙的宏伟挂毯中，我们是多么渺小和相互联系。 总之，星系不仅仅是恒星的集合；它们是宇宙的构建基石，包含着宇宙演化历史的印记。通过研究星系，我们揭开了宇宙的秘密，深入理解了宇宙的复杂性和美丽。无论是通过科学探究还是艺术灵感，对星系的探索将继续吸引人类几代人。